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Renesas ICL7660CBAZA
- Part No.:
- ICL7660CBAZA
- Manufacturer:
- Renesas
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7660CBAZA.pdf
- Description:
- IC REG CHARG PUMP INV 45MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,261
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Product details
Overview
ICL7660CBAZA from Renesas Electronics is a monolithic CMOS charge-pump voltage converter IC that performs positive-to-negative supply conversion across 1.5V–12V input, delivering complementary output voltages from –1.5V to –12V. It integrates an RC oscillator (10 kHz nominal at 5V), internal power MOS switches, voltage level translator, and series regulator. Requires only two external non-critical capacitors and supports boost-mode operation via Pin 1 for lower output impedance-used in RS-232 power supplies and ±5V logic splitting.
For engineers reviewing the ICL7660CBAZA datasheet, ICL7660CBAZA pinout, ICL7660CBAZA application, or ICL7660CBAZA equivalent, this device delivers verified 96% minimum power efficiency, 99% open-circuit voltage conversion efficiency, 60 Ω typical output source resistance at 20 mA, guaranteed operation from 0°C to +70°C, and Pb-free SOIC-8 packaging compliant with RoHS.
Technical Context
The ICL7660CBAZA implements a switched-capacitor charge-pump architecture using four internal MOS switches (one P-channel, three N-channel) controlled by a divide-by-2 counter and oscillator. Its substrate bias network dynamically adjusts S3/S4 body potentials to prevent latch-up during start-up and short-circuit conditions.
It features dual operating modes: standard mode (LV pin floating for V+ > 3.5V) and low-voltage mode (LV tied to GND for 1.5V–3.5V operation). The BOOST pin (Pin 1) enables 3.5× oscillator frequency scaling to reduce output impedance when smaller external capacitors are used.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.5V to 12V - supports single-supply systems from low-power sensors to industrial logic rails |
| Oscillator Frequency | 10 kHz nominal (5–35 kHz adjustable via BOOST pin or external capacitor) - sets charge-pump switching rate and directly impacts output impedance and ripple |
| Output Source Resistance | 60 Ω typical at 20 mA, 5V - defines maximum load regulation error and voltage droop under dynamic current draw |
| Power Efficiency | ≥96% at 5 kΩ load - minimizes thermal rise and extends battery life in portable instrumentation |
| Voltage Conversion Efficiency | ≥99% open-circuit - ensures near-ideal inversion with negligible quiescent loss in high-impedance monitoring circuits |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded control and data acquisition environments |
| Package | 8-lead SOIC (Pb-free, RoHS-compliant) - surface-mount compatible with standard reflow profiles and IPC/JEDEC MSL-1 handling |
Pinout & Package
ICL7660CBAZA is housed in an 8-lead SOIC package (JEDEC MS-012, package drawing M8.15), 3.9 mm × 4.9 mm footprint, 1.75 mm height, with gull-wing leads and matte tin (e3) termination.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BOOST) | Oscillator frequency control input | Connect to V+ to triple oscillator frequency (~35 kHz), reducing output impedance and enabling use of smaller pump capacitors (e.g., 0.1 µF) |
| 2 (CAP+) | Charge pump capacitor connection | Anode terminal for external pump capacitor C1; polarity-sensitive when using polarized electrolytics (+ to Pin 2) |
| 3 (GND) | Ground reference | System ground return for internal regulator, oscillator, and switch logic; must be low-impedance for stable operation |
| 4 (CAP−) | Charge reservoir capacitor connection | Cathode terminal for external reservoir capacitor C2; connects to negative output node and requires low-ESR design |
| 5 (VOUT) | Negative output terminal | Delivers inverted supply (–V+) - must not exceed GND potential to avoid latch-up; Schottky clamp recommended for V+ > 5V |
| 6 (LV) | Low-voltage mode enable | Tie to GND for 1.5V–3.5V operation (bypasses internal regulator); leave floating for 3.5V–12V to prevent latch-up |
| 7 (OSC) | Oscillator timing node | Accepts external capacitor to lower frequency (e.g., 100 pF → ~1 kHz) or external clock (via 1 kΩ series resistor) |
| 8 (V+) | Positive input supply | Primary power input; supplies internal regulator, oscillator, and switch drivers - max rating 13 V absolute |
Key Features
| Feature | Design Value |
|---|---|
| Boost-pin frequency scaling | Enables 35 kHz operation to cut output impedance by ~3×, permitting 0.1 µF pump capacitors instead of 10 µF - critical for space-constrained PCBs |
| Dynamic substrate bias control | Prevents SCR latch-up during start-up and output short-circuit by real-time adjustment of S3/S4 body potentials - eliminates need for external diode in most designs |
| LV pin selectable regulation | Disables internal series regulator when LV = GND, extending functional range down to 1.5V while maintaining stability - essential for coin-cell and ultra-low-VDD applications |
| Guaranteed 99% open-circuit efficiency | Minimizes no-load power loss in always-on monitoring circuits (e.g., sensor biasing, standby comparators), improving system-level energy budget |
| Pb-free SOIC-8 packaging | RoHS-compliant e3 matte tin finish compatible with SnPb and Pb-free soldering processes - supports legacy and modern assembly lines without requalification |
Applications
| RS-232 Power Supply | ±5V Logic Splitting |
|---|---|
|
Use Scenario: Generating dual-rail supplies for RS-232 transceivers (e.g., MAX232 replacement) from a single +5V rail in industrial serial interfaces. IC Role / Device Role / Timing Role: Charge-pump voltage inverter providing regulated –5.5V output to meet RS-232 driver voltage swing requirements. Use Value: Eliminates need for external inductors or transformers; achieves <100 mV ripple with 10 µF/low-ESR capacitors and 10 kHz switching. |
Use Scenario: Converting a +5V microcontroller supply into symmetrical ±5V rails for op-amp signal conditioning in portable test equipment. IC Role / Device Role / Timing Role: Bidirectional voltage converter operating as both inverter (–5V) and doubler (+10V), then split via resistive divider or LDO. Use Value: Delivers 96% power efficiency at 10 mA load, enabling compact, fanless enclosure design with minimal thermal derating. |
| Negative Supply for Data Acquisition | Supply Splitter for Precision ADC |
|
Use Scenario: Providing clean –5V reference supply to 16-bit SAR ADCs (e.g., AD768x) in battery-powered environmental sensors. IC Role / Device Role / Timing Role: Low-noise negative rail generator with 60 Ω output impedance, supporting 10 mA peak current during conversion bursts. Use Value: Maintains ≥99% voltage conversion efficiency at open-circuit, minimizing self-heating-induced offset drift in precision analog front-ends. |
Use Scenario: Splitting a +15V analog supply into ±7.5V rails for dual-supply instrumentation amplifiers (e.g., INA128) in medical ECG front-ends. IC Role / Device Role / Timing Role: Symmetrical charge-pump splitter using matched C1/C2 and LV-bypassed operation for balanced sourcing/sinking. Use Value: Achieves <250 Ω combined output resistance with paralleled devices, enabling ±10 mA continuous drive without rail collapse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7660ACPAZ | Same electrical specs but in 8-lead PDIP package; higher θJA (110°C/W vs. 160°C/W), no Pb-free reflow compatibility | Suitable for through-hole prototyping or wave-soldered industrial boards where SOIC reflow is unavailable | Select ICL7660ACPAZ only if manual assembly or legacy wave-solder infrastructure is required; otherwise prefer ICL7660CBAZA for automated SMT yield |
| MAX1044CPA+ | Higher max supply (16V), 25 kHz fixed oscillator, no BOOST pin; 120 Ω typical ROUT at 20 mA; requires external diode for latch-up immunity | Better suited for high-voltage (>12V) or noise-sensitive applications where fixed-frequency operation simplifies EMI filtering | Choose MAX1044CPA+ when input exceeds 12V or when deterministic 25 kHz switching is preferred over adjustable frequency; accept added BOM cost and layout complexity |
Compared with ICL7660CBAZA, ICL7660ACPAZ offers identical functionality in through-hole form but lacks Pb-free reflow support, while MAX1044CPA+ trades BOOST flexibility and latch-up immunity for higher voltage tolerance and fixed-frequency predictability-making each suitable for distinct mechanical, thermal, or regulatory constraints.
Availability
ICL7660CBAZA is available at Aetrix Electronics and suitable for RS-232 power supplies, ±5V logic splitting, and negative supplies for data acquisition systems requiring stable component supply across commercial temperature ranges.
Supply support for ICL7660CBAZA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and IoT applications.
The ICL7660CBAZA belongs to Renesas' legacy Super Voltage Converter family, designed specifically for low-quiescent, capacitor-based DC-DC inversion in space- and cost-constrained embedded systems without inductors.
FAQ
What is the maximum input voltage supported by the ICL7660CBAZA?
The ICL7660CBAZA has an absolute maximum supply voltage rating of +13.0 V, with guaranteed operation up to +12 V across its full commercial temperature range (0°C to +70°C). Operation above 12 V risks exceeding specified electrical limits and may compromise long-term reliability or trigger latch-up if the LV pin is incorrectly biased.
Can the ICL7660CBAZA generate positive voltage doubling as well as negative inversion?
Yes, the ICL7660CBAZA supports positive voltage doubling using the configuration in Figure 18 of the FN3179 datasheet. By re-routing external diodes and capacitors, it delivers up to 22.8 V from a 12 V input. This mode uses the same internal switches but alters charge transfer direction - no change to the ICL7660CBAZA itself is required.
Is an external Schottky diode required for safe operation of the ICL7660CBAZA?
An external Schottky diode from VOUT (Pin 5) to CAP− (Pin 4) is recommended when V+ exceeds 5.5 V and the input voltage rise rate exceeds 2 V/µs, per Note 6 in the "Do's and Don'ts" section. This prevents forward-biasing Q4's body diode and avoids destructive latch-up - the ICL7660CBAZA does not integrate this protection internally.
How does the BOOST pin (Pin 1) affect output performance of the ICL7660CBAZA?
Connecting the BOOST pin (Pin 1) to V+ increases the internal oscillator frequency from ~10 kHz to ~35 kHz, which lowers output source resistance and reduces ripple voltage. This allows use of smaller pump capacitors (e.g., 0.1 µF instead of 10 µF) while maintaining equivalent load regulation - a key advantage for miniaturized PCB layouts.
What is the purpose of the LV pin on the ICL7660CBAZA, and how should it be configured?
The LV pin enables low-voltage mode: tie LV to GND for operation from 1.5 V to 3.5 V (bypassing the internal series regulator), or leave it floating for 3.5 V to 12 V operation. Incorrect LV configuration - such as grounding LV above 3.5 V - causes latch-up and permanent device failure per datasheet Note 2 and Do's and Don'ts #2.
ICL7660CBAZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 45mA
- Frequency - Switching:
- 10kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7660CBAZA FAQ
1.How can I place an order for ICL7660CBAZA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7660CBAZA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ICL7660CBAZA reliable?
The price and inventory of ICL7660CBAZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7660CBAZA is usually 5 days.
3.What payment methods are accepted for ICL7660CBAZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7660CBAZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7660CBAZA?
ICL7660CBAZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7660CBAZA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ICL7660CBAZA?
For technical support, including ICL7660CBAZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7660CBAZA requirements.
6.How does Aetrix verify that ICL7660CBAZA is sourced from the original manufacturer or authorized distributors?
All ICL7660CBAZA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ICL7660CBAZA meets industry standards.
7.What is the process for return or replacement of ICL7660CBAZA?
All ICL7660CBAZA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7660CBAZA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ICL7660CBAZA part is unused and in its original packaging.
Return procedure for ICL7660CBAZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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